use vec::{OwnedVector, ImmutableVector};
/// `Either` is a type that represents one of two alternatives
-#[deriving(Clone, Eq)]
+#[deriving(Clone, Eq, IterBytes)]
pub enum Either<L, R> {
Left(L),
Right(R)
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use prelude::*;
+
+use cast;
+use int;
+use rt::io::Decorator;
+use rt::io::mem::MemWriter;
+use rt::io;
+use str;
+use sys;
+use uint;
+use util;
+use vec;
+
+pub mod parse;
+pub mod rt;
+
+/// A struct to represent both where to emit formatting strings to and how they
+/// should be formatted. A mutable version of this is passed to all formatting
+/// traits.
+pub struct Formatter<'self> {
+ /// Flags for formatting (packed version of rt::Flag)
+ flags: uint,
+ /// Character used as 'fill' whenever there is alignment
+ fill: char,
+ /// Boolean indication of whether the output should be left-aligned
+ alignleft: bool,
+ /// Optionally specified integer width that the output should be
+ width: Option<uint>,
+ /// Optionally specified precision for numeric types
+ precision: Option<uint>,
+
+ /// Output buffer.
+ buf: &'self mut io::Writer,
+
+ priv curarg: vec::VecIterator<'self, Argument<'self>>,
+ priv args: &'self [Argument<'self>],
+}
+
+/// This struct represents the generic "argument" which is taken by the Xprintf
+/// family of functions. It contains a function to format the given value. At
+/// compile time it is ensured that the function and the value have the correct
+/// types, and then this struct is used to canonicalize arguments to one type.
+pub struct Argument<'self> {
+ priv formatter: extern "Rust" fn(&util::Void, &mut Formatter),
+ priv value: &'self util::Void,
+}
+
+#[allow(missing_doc)]
+pub trait Bool { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait Char { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait Signed { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait Unsigned { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait Octal { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait Binary { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait LowerHex { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait UpperHex { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait String { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait Poly { fn fmt(&Self, &mut Formatter); }
+#[allow(missing_doc)]
+pub trait Pointer { fn fmt(&Self, &mut Formatter); }
+
+/// The sprintf function takes a precompiled format string and a list of
+/// arguments, to return the resulting formatted string.
+///
+/// This is currently an unsafe function because the types of all arguments
+/// aren't verified by immediate callers of this function. This currently does
+/// not validate that the correct types of arguments are specified for each
+/// format specifier, nor that each argument itself contains the right function
+/// for formatting the right type value. Because of this, the function is marked
+/// as `unsafe` if this is being called manually.
+///
+/// Thankfully the rust compiler provides the macro `ifmt!` which will perform
+/// all of this validation at compile-time and provides a safe interface for
+/// invoking this function.
+///
+/// # Arguments
+///
+/// * fmts - the precompiled format string to emit.
+/// * args - the list of arguments to the format string. These are only the
+/// positional arguments (not named)
+///
+/// Note that this function assumes that there are enough arguments for the
+/// format string.
+pub unsafe fn sprintf(fmt: &[rt::Piece], args: &[Argument]) -> ~str {
+ let output = MemWriter::new();
+ {
+ let mut formatter = Formatter {
+ flags: 0,
+ width: None,
+ precision: None,
+ // FIXME(#8248): shouldn't need a transmute
+ buf: cast::transmute(&output as &io::Writer),
+ alignleft: false,
+ fill: ' ',
+ args: args,
+ curarg: args.iter(),
+ };
+ for piece in fmt.iter() {
+ formatter.run(piece, None);
+ }
+ }
+ return str::from_bytes_owned(output.inner());
+}
+
+impl<'self> Formatter<'self> {
+ fn run(&mut self, piece: &rt::Piece, cur: Option<&str>) {
+ let setcount = |slot: &mut Option<uint>, cnt: &parse::Count| {
+ match *cnt {
+ parse::CountIs(n) => { *slot = Some(n); }
+ parse::CountImplied => { *slot = None; }
+ parse::CountIsParam(i) => {
+ let v = self.args[i].value;
+ unsafe { *slot = Some(*(v as *util::Void as *uint)); }
+ }
+ parse::CountIsNextParam => {
+ let v = self.curarg.next().unwrap().value;
+ unsafe { *slot = Some(*(v as *util::Void as *uint)); }
+ }
+ }
+ };
+
+ match *piece {
+ rt::String(s) => { self.buf.write(s.as_bytes()); }
+ rt::CurrentArgument(()) => { self.buf.write(cur.unwrap().as_bytes()); }
+ rt::Argument(ref arg) => {
+ // Fill in the format parameters into the formatter
+ self.fill = arg.format.fill;
+ self.alignleft = arg.format.alignleft;
+ self.flags = arg.format.flags;
+ setcount(&mut self.width, &arg.format.width);
+ setcount(&mut self.precision, &arg.format.precision);
+
+ // Extract the correct argument
+ let value = match arg.position {
+ rt::ArgumentNext => { *self.curarg.next().unwrap() }
+ rt::ArgumentIs(i) => self.args[i],
+ };
+
+ // Then actually do some printing
+ match arg.method {
+ None => { (value.formatter)(value.value, self); }
+ Some(ref method) => { self.execute(*method, value); }
+ }
+ }
+ }
+ }
+
+ fn execute(&mut self, method: &rt::Method, arg: Argument) {
+ match *method {
+ // Pluralization is selection upon a numeric value specified as the
+ // parameter.
+ rt::Plural(offset, ref selectors, ref default) => {
+ // This is validated at compile-time to be a pointer to a
+ // '&uint' value.
+ let value: &uint = unsafe { cast::transmute(arg.value) };
+ let value = *value;
+
+ // First, attempt to match against explicit values without the
+ // offsetted value
+ for s in selectors.iter() {
+ match s.selector {
+ Right(val) if value == val => {
+ return self.runplural(value, s.result);
+ }
+ _ => {}
+ }
+ }
+
+ // Next, offset the value and attempt to match against the
+ // keyword selectors.
+ let value = value - match offset { Some(i) => i, None => 0 };
+ for s in selectors.iter() {
+ let run = match s.selector {
+ Left(parse::Zero) => value == 0,
+ Left(parse::One) => value == 1,
+ Left(parse::Two) => value == 2,
+
+ // XXX: Few/Many should have a user-specified boundary
+ // One possible option would be in the function
+ // pointer of the 'arg: Argument' struct.
+ Left(parse::Few) => value < 8,
+ Left(parse::Many) => value >= 8,
+
+ Right(*) => false
+ };
+ if run {
+ return self.runplural(value, s.result);
+ }
+ }
+
+ self.runplural(value, *default);
+ }
+
+ // Select is just a matching against the string specified.
+ rt::Select(ref selectors, ref default) => {
+ // This is validated at compile-time to be a pointer to a
+ // string slice,
+ let value: & &str = unsafe { cast::transmute(arg.value) };
+ let value = *value;
+
+ for s in selectors.iter() {
+ if s.selector == value {
+ for piece in s.result.iter() {
+ self.run(piece, Some(value));
+ }
+ return;
+ }
+ }
+ for piece in default.iter() {
+ self.run(piece, Some(value));
+ }
+ }
+ }
+ }
+
+ fn runplural(&mut self, value: uint, pieces: &[rt::Piece]) {
+ do uint::to_str_bytes(value, 10) |buf| {
+ let valuestr = str::from_bytes_slice(buf);
+ for piece in pieces.iter() {
+ self.run(piece, Some(valuestr));
+ }
+ }
+ }
+}
+
+/// This is a function which calls are emitted to by the compiler itself to
+/// create the Argument structures that are passed into the `sprintf` function.
+#[doc(hidden)]
+pub fn argument<'a, T>(f: extern "Rust" fn(&T, &mut Formatter),
+ t: &'a T) -> Argument<'a> {
+ unsafe {
+ Argument {
+ formatter: cast::transmute(f),
+ value: cast::transmute(t)
+ }
+ }
+}
+
+/// When the compiler determines that the type of an argument *must* be a string
+/// (such as for select), then it invokes this method.
+#[doc(hidden)]
+pub fn argumentstr<'a>(s: &'a &str) -> Argument<'a> {
+ argument(String::fmt, s)
+}
+
+/// When the compiler determines that the type of an argument *must* be a uint
+/// (such as for plural), then it invokes this method.
+#[doc(hidden)]
+pub fn argumentuint<'a>(s: &'a uint) -> Argument<'a> {
+ argument(Unsigned::fmt, s)
+}
+
+// Implementations of the core formatting traits
+
+impl Bool for bool {
+ fn fmt(b: &bool, f: &mut Formatter) {
+ String::fmt(&(if *b {"true"} else {"false"}), f);
+ }
+}
+
+impl<'self> String for &'self str {
+ fn fmt(s: & &'self str, f: &mut Formatter) {
+ // XXX: formatting args
+ f.buf.write(s.as_bytes())
+ }
+}
+
+impl Char for char {
+ fn fmt(c: &char, f: &mut Formatter) {
+ // XXX: formatting args
+ // XXX: shouldn't require an allocation
+ let mut s = ~"";
+ s.push_char(*c);
+ f.buf.write(s.as_bytes());
+ }
+}
+
+impl Signed for int {
+ fn fmt(c: &int, f: &mut Formatter) {
+ // XXX: formatting args
+ do int::to_str_bytes(*c, 10) |buf| {
+ f.buf.write(buf);
+ }
+ }
+}
+
+impl Unsigned for uint {
+ fn fmt(c: &uint, f: &mut Formatter) {
+ // XXX: formatting args
+ do uint::to_str_bytes(*c, 10) |buf| {
+ f.buf.write(buf);
+ }
+ }
+}
+
+impl Octal for uint {
+ fn fmt(c: &uint, f: &mut Formatter) {
+ // XXX: formatting args
+ do uint::to_str_bytes(*c, 8) |buf| {
+ f.buf.write(buf);
+ }
+ }
+}
+
+impl LowerHex for uint {
+ fn fmt(c: &uint, f: &mut Formatter) {
+ // XXX: formatting args
+ do uint::to_str_bytes(*c, 16) |buf| {
+ f.buf.write(buf);
+ }
+ }
+}
+
+impl UpperHex for uint {
+ fn fmt(c: &uint, f: &mut Formatter) {
+ // XXX: formatting args
+ do uint::to_str_bytes(*c, 16) |buf| {
+ let mut local = [0u8, ..16];
+ for (l, &b) in local.mut_iter().zip(buf.iter()) {
+ *l = match b as char {
+ 'a' .. 'f' => (b - 'a' as u8) + 'A' as u8,
+ _ => b,
+ };
+ }
+ f.buf.write(local.slice_to(buf.len()));
+ }
+ }
+}
+
+impl<T> Poly for T {
+ fn fmt(t: &T, f: &mut Formatter) {
+ // XXX: formatting args
+ let s = sys::log_str(t);
+ f.buf.write(s.as_bytes());
+ }
+}
+
+// n.b. use 'const' to get an implementation for both '*mut' and '*' at the same
+// time.
+impl<T> Pointer for *const T {
+ fn fmt(t: &*const T, f: &mut Formatter) {
+ // XXX: formatting args
+ f.buf.write("0x".as_bytes());
+ LowerHex::fmt(&(*t as uint), f);
+ }
+}
+
+// If you expected tests to be here, look instead at the run-pass/ifmt.rs test,
+// it's a lot easier than creating all of the rt::Piece structures here.
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use prelude::*;
+
+use char;
+use str;
+use iterator;
+
+condition! { pub parse_error: ~str -> (); }
+
+/// A piece is a portion of the format string which represents the next part to
+/// emit. These are emitted as a stream by the `Parser` class.
+#[deriving(Eq)]
+pub enum Piece<'self> {
+ /// A literal string which should directly be emitted
+ String(&'self str),
+ /// A back-reference to whatever the current argument is. This is used
+ /// inside of a method call to refer back to the original argument.
+ CurrentArgument,
+ /// This describes that formatting should process the next argument (as
+ /// specified inside) for emission.
+ Argument(Argument<'self>),
+}
+
+/// Representation of an argument specification.
+#[deriving(Eq)]
+pub struct Argument<'self> {
+ /// Where to find this argument
+ position: Position<'self>,
+ /// How to format the argument
+ format: FormatSpec<'self>,
+ /// If not `None`, what method to invoke on the argument
+ method: Option<~Method<'self>>
+}
+
+/// Specification for the formatting of an argument in the format string.
+#[deriving(Eq)]
+pub struct FormatSpec<'self> {
+ /// Optionally specified character to fill alignment with
+ fill: Option<char>,
+ /// Optionally specified alignment
+ align: Option<Alignment>,
+ /// Packed version of various flags provided
+ flags: uint,
+ /// The integer precision to use
+ precision: Count,
+ /// The string width requested for the resulting format
+ width: Count,
+ /// The descriptor string representing the name of the format desired for
+ /// this argument, this can be empty or any number of characters, although
+ /// it is required to be one word.
+ ty: &'self str
+}
+
+/// Enum describing where an argument for a format can be located.
+#[deriving(Eq)]
+pub enum Position<'self> {
+ ArgumentNext, ArgumentIs(uint), ArgumentNamed(&'self str)
+}
+
+/// Enum of alignments which are supoprted.
+#[deriving(Eq)]
+pub enum Alignment { AlignLeft, AlignRight }
+
+/// Various flags which can be applied to format strings, the meaning of these
+/// flags is defined by the formatters themselves.
+#[deriving(Eq)]
+pub enum Flag {
+ FlagSignPlus,
+ FlagSignMinus,
+ FlagAlternate,
+}
+
+/// A count is used for the precision and width parameters of an integer, and
+/// can reference either an argument or a literal integer.
+#[deriving(Eq)]
+pub enum Count {
+ CountIs(uint),
+ CountIsParam(uint),
+ CountIsNextParam,
+ CountImplied,
+}
+
+/// Enum describing all of the possible methods which the formatting language
+/// currently supports.
+#[deriving(Eq)]
+pub enum Method<'self> {
+ /// A plural method selects on an integer over a list of either integer or
+ /// keyword-defined clauses. The meaning of the keywords is defined by the
+ /// current locale.
+ ///
+ /// An offset is optionally present at the beginning which is used to match
+ /// against keywords, but it is not matched against the literal integers.
+ ///
+ /// The final element of this enum is the default "other" case which is
+ /// always required to be specified.
+ Plural(Option<uint>, ~[PluralArm<'self>], ~[Piece<'self>]),
+
+ /// A select method selects over a string. Each arm is a different string
+ /// which can be selected for.
+ ///
+ /// As with `Plural`, a default "other" case is required as well.
+ Select(~[SelectArm<'self>], ~[Piece<'self>]),
+}
+
+/// Structure representing one "arm" of the `plural` function.
+#[deriving(Eq)]
+pub struct PluralArm<'self> {
+ /// A selector can either be specified by a keyword or with an integer
+ /// literal.
+ selector: Either<PluralKeyword, uint>,
+ /// Array of pieces which are the format of this arm
+ result: ~[Piece<'self>],
+}
+
+/// Enum of the 5 CLDR plural keywords. There is one more, "other", but that is
+/// specially placed in the `Plural` variant of `Method`
+///
+/// http://www.icu-project.org/apiref/icu4c/classicu_1_1PluralRules.html
+#[deriving(Eq, IterBytes)]
+pub enum PluralKeyword {
+ Zero, One, Two, Few, Many
+}
+
+/// Structure representing one "arm" of the `select` function.
+#[deriving(Eq)]
+pub struct SelectArm<'self> {
+ /// String selector which guards this arm
+ selector: &'self str,
+ /// Array of pieces which are the format of this arm
+ result: ~[Piece<'self>],
+}
+
+/// The parser structure for interpreting the input format string. This is
+/// modelled as an iterator over `Piece` structures to form a stream of tokens
+/// being output.
+///
+/// This is a recursive-descent parser for the sake of simplicity, and if
+/// necessary there's probably lots of room for improvement performance-wise.
+pub struct Parser<'self> {
+ priv input: &'self str,
+ priv cur: str::CharOffsetIterator<'self>,
+}
+
+impl<'self> iterator::Iterator<Piece<'self>> for Parser<'self> {
+ fn next(&mut self) -> Option<Piece<'self>> {
+ match self.cur.clone().next() {
+ Some((_, '#')) => { self.cur.next(); Some(CurrentArgument) }
+ Some((_, '{')) => {
+ self.cur.next();
+ let ret = Some(Argument(self.argument()));
+ if !self.consume('}') {
+ self.err(~"unterminated format string");
+ }
+ ret
+ }
+ Some((pos, '\\')) => {
+ self.cur.next();
+ self.escape(); // ensure it's a valid escape sequence
+ Some(String(self.string(pos + 1))) // skip the '\' character
+ }
+ Some((_, '}')) | None => { None }
+ Some((pos, _)) => {
+ Some(String(self.string(pos)))
+ }
+ }
+ }
+}
+
+impl<'self> Parser<'self> {
+ /// Creates a new parser for the given format string
+ pub fn new<'a>(s: &'a str) -> Parser<'a> {
+ Parser {
+ input: s,
+ cur: s.char_offset_iter(),
+ }
+ }
+
+ /// Notifies of an error. The message doesn't actually need to be of type
+ /// ~str, but I think it does when this eventually uses conditions so it
+ /// might as well start using it now.
+ fn err(&self, msg: ~str) {
+ parse_error::cond.raise(msg);
+ }
+
+ /// Optionally consumes the specified character. If the character is not at
+ /// the current position, then the current iterator isn't moved and false is
+ /// returned, otherwise the character is consumed and true is returned.
+ fn consume(&mut self, c: char) -> bool {
+ match self.cur.clone().next() {
+ Some((_, maybe)) if c == maybe => {
+ self.cur.next();
+ true
+ }
+ Some(*) | None => false,
+ }
+ }
+
+ /// Attempts to consume any amount of whitespace followed by a character
+ fn wsconsume(&mut self, c: char) -> bool {
+ self.ws(); self.consume(c)
+ }
+
+ /// Consumes all whitespace characters until the first non-whitespace
+ /// character
+ fn ws(&mut self) {
+ loop {
+ match self.cur.clone().next() {
+ Some((_, c)) if char::is_whitespace(c) => { self.cur.next(); }
+ Some(*) | None => { return }
+ }
+ }
+ }
+
+ /// Consumes an escape sequence, failing if there is not a valid character
+ /// to be escaped.
+ fn escape(&mut self) -> char {
+ match self.cur.next() {
+ Some((_, c @ '#')) | Some((_, c @ '{')) |
+ Some((_, c @ '\\')) | Some((_, c @ '}')) => { c }
+ Some((_, c)) => {
+ self.err(fmt!("invalid escape character `%c`", c));
+ c
+ }
+ None => {
+ self.err(~"expected an escape sequence, but format string was \
+ terminated");
+ ' '
+ }
+ }
+ }
+
+ /// Parses all of a string which is to be considered a "raw literal" in a
+ /// format string. This is everything outside of the braces.
+ fn string(&mut self, start: uint) -> &'self str {
+ loop {
+ // we may not consume the character, so clone the iterator
+ match self.cur.clone().next() {
+ Some((pos, '\\')) | Some((pos, '#')) |
+ Some((pos, '}')) | Some((pos, '{')) => {
+ return self.input.slice(start, pos);
+ }
+ Some(*) => { self.cur.next(); }
+ None => {
+ self.cur.next();
+ return self.input.slice(start, self.input.len());
+ }
+ }
+ }
+ }
+
+ /// Parses an Argument structure, or what's contained within braces inside
+ /// the format string
+ fn argument(&mut self) -> Argument<'self> {
+ Argument {
+ position: self.position(),
+ format: self.format(),
+ method: self.method(),
+ }
+ }
+
+ /// Parses a positional argument for a format. This could either be an
+ /// integer index of an argument, a named argument, or a blank string.
+ fn position(&mut self) -> Position<'self> {
+ match self.integer() {
+ Some(i) => { ArgumentIs(i) }
+ None => {
+ match self.cur.clone().next() {
+ Some((_, c)) if char::is_alphabetic(c) => {
+ ArgumentNamed(self.word())
+ }
+ _ => ArgumentNext
+ }
+ }
+ }
+ }
+
+ /// Parses a format specifier at the current position, returning all of the
+ /// relevant information in the FormatSpec struct.
+ fn format(&mut self) -> FormatSpec<'self> {
+ let mut spec = FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountImplied,
+ width: CountImplied,
+ ty: self.input.slice(0, 0),
+ };
+ if !self.consume(':') { return spec }
+
+ // fill character
+ match self.cur.clone().next() {
+ Some((_, c)) => {
+ match self.cur.clone().skip(1).next() {
+ Some((_, '>')) | Some((_, '<')) => {
+ spec.fill = Some(c);
+ self.cur.next();
+ }
+ Some(*) | None => {}
+ }
+ }
+ None => {}
+ }
+ // Alignment
+ if self.consume('<') {
+ spec.align = Some(AlignLeft);
+ } else if self.consume('>') {
+ spec.align = Some(AlignRight);
+ }
+ // Sign flags
+ if self.consume('+') {
+ spec.flags |= 1 << (FlagSignPlus as uint);
+ } else if self.consume('-') {
+ spec.flags |= 1 << (FlagSignMinus as uint);
+ }
+ // Alternate marker
+ if self.consume('#') {
+ spec.flags |= 1 << (FlagAlternate as uint);
+ }
+ // Width and precision
+ spec.width = self.count();
+ if self.consume('.') {
+ if self.consume('*') {
+ spec.precision = CountIsNextParam;
+ } else {
+ spec.precision = self.count();
+ }
+ }
+ // Finally the actual format specifier
+ spec.ty = self.word();
+ return spec;
+ }
+
+ /// Parses a method to be applied to the previously specified argument and
+ /// its format. The two current supported methods are 'plural' and 'select'
+ fn method(&mut self) -> Option<~Method<'self>> {
+ if !self.wsconsume(',') {
+ return None;
+ }
+ self.ws();
+ match self.word() {
+ "select" => {
+ if !self.wsconsume(',') {
+ self.err(~"`select` must be followed by `,`");
+ }
+ Some(self.select())
+ }
+ "plural" => {
+ if !self.wsconsume(',') {
+ self.err(~"`plural` must be followed by `,`");
+ }
+ Some(self.plural())
+ }
+ "" => {
+ self.err(~"expected method after comma");
+ return None;
+ }
+ method => {
+ self.err(fmt!("unknown method: `%s`", method));
+ return None;
+ }
+ }
+ }
+
+ /// Parses a 'select' statement (after the initial 'select' word)
+ fn select(&mut self) -> ~Method<'self> {
+ let mut other = None;
+ let mut arms = ~[];
+ // Consume arms one at a time
+ loop {
+ self.ws();
+ let selector = self.word();
+ if selector == "" {
+ self.err(~"cannot have an empty selector");
+ break
+ }
+ if !self.wsconsume('{') {
+ self.err(~"selector must be followed by `{`");
+ }
+ let pieces = self.collect();
+ if !self.wsconsume('}') {
+ self.err(~"selector case must be terminated by `}`");
+ }
+ if selector == "other" {
+ if !other.is_none() {
+ self.err(~"multiple `other` statements in `select");
+ }
+ other = Some(pieces);
+ } else {
+ arms.push(SelectArm { selector: selector, result: pieces });
+ }
+ self.ws();
+ match self.cur.clone().next() {
+ Some((_, '}')) => { break }
+ Some(*) | None => {}
+ }
+ }
+ // The "other" selector must be present
+ let other = match other {
+ Some(arm) => { arm }
+ None => {
+ self.err(~"`select` statement must provide an `other` case");
+ ~[]
+ }
+ };
+ ~Select(arms, other)
+ }
+
+ /// Parses a 'plural' statement (after the initial 'plural' word)
+ fn plural(&mut self) -> ~Method<'self> {
+ let mut offset = None;
+ let mut other = None;
+ let mut arms = ~[];
+
+ // First, attempt to parse the 'offset:' field. We know the set of
+ // selector words which can appear in plural arms, and the only ones
+ // which start with 'o' are "other" and "offset", hence look two
+ // characters deep to see if we can consume the word "offset"
+ self.ws();
+ let mut it = self.cur.clone();
+ match it.next() {
+ Some((_, 'o')) => {
+ match it.next() {
+ Some((_, 'f')) => {
+ let word = self.word();
+ if word != "offset" {
+ self.err(fmt!("expected `offset`, found `%s`",
+ word));
+ } else {
+ if !self.consume(':') {
+ self.err(~"`offset` must be followed by `:`");
+ }
+ match self.integer() {
+ Some(i) => { offset = Some(i); }
+ None => {
+ self.err(~"offset must be an integer");
+ }
+ }
+ }
+ }
+ Some(*) | None => {}
+ }
+ }
+ Some(*) | None => {}
+ }
+
+ // Next, generate all the arms
+ loop {
+ let mut isother = false;
+ let selector = if self.wsconsume('=') {
+ match self.integer() {
+ Some(i) => Right(i),
+ None => {
+ self.err(~"plural `=` selectors must be followed by an \
+ integer");
+ Right(0)
+ }
+ }
+ } else {
+ let word = self.word();
+ match word {
+ "other" => { isother = true; Left(Zero) }
+ "zero" => Left(Zero),
+ "one" => Left(One),
+ "two" => Left(Two),
+ "few" => Left(Few),
+ "many" => Left(Many),
+ word => {
+ self.err(fmt!("unexpected plural selector `%s`", word));
+ if word == "" {
+ break
+ } else {
+ Left(Zero)
+ }
+ }
+ }
+ };
+ if !self.wsconsume('{') {
+ self.err(~"selector must be followed by `{`");
+ }
+ let pieces = self.collect();
+ if !self.wsconsume('}') {
+ self.err(~"selector case must be terminated by `}`");
+ }
+ if isother {
+ if !other.is_none() {
+ self.err(~"multiple `other` statements in `select");
+ }
+ other = Some(pieces);
+ } else {
+ arms.push(PluralArm { selector: selector, result: pieces });
+ }
+ self.ws();
+ match self.cur.clone().next() {
+ Some((_, '}')) => { break }
+ Some(*) | None => {}
+ }
+ }
+
+ let other = match other {
+ Some(arm) => { arm }
+ None => {
+ self.err(~"`plural` statement must provide an `other` case");
+ ~[]
+ }
+ };
+ ~Plural(offset, arms, other)
+ }
+
+ /// Parses a Count parameter at the current position. This does not check
+ /// for 'CountIsNextParam' because that is only used in precision, not
+ /// width.
+ fn count(&mut self) -> Count {
+ match self.integer() {
+ Some(i) => {
+ if self.consume('$') {
+ CountIsParam(i)
+ } else {
+ CountIs(i)
+ }
+ }
+ None => { CountImplied }
+ }
+ }
+
+ /// Parses a word starting at the current position. A word is considered to
+ /// be an alphabetic character followed by any number of alphanumeric
+ /// characters.
+ fn word(&mut self) -> &'self str {
+ let start = match self.cur.clone().next() {
+ Some((pos, c)) if char::is_alphabetic(c) => {
+ self.cur.next();
+ pos
+ }
+ Some(*) | None => { return self.input.slice(0, 0); }
+ };
+ let mut end;
+ loop {
+ match self.cur.clone().next() {
+ Some((_, c)) if char::is_alphanumeric(c) => {
+ self.cur.next();
+ }
+ Some((pos, _)) => { end = pos; break }
+ None => { end = self.input.len(); break }
+ }
+ }
+ self.input.slice(start, end)
+ }
+
+ /// Optionally parses an integer at the current position. This doesn't deal
+ /// with overflow at all, it's just accumulating digits.
+ fn integer(&mut self) -> Option<uint> {
+ let mut cur = 0;
+ let mut found = false;
+ loop {
+ match self.cur.clone().next() {
+ Some((_, c)) => {
+ match char::to_digit(c, 10) {
+ Some(i) => {
+ cur = cur * 10 + i;
+ found = true;
+ self.cur.next();
+ }
+ None => { break }
+ }
+ }
+ None => { break }
+ }
+ }
+ if found {
+ return Some(cur);
+ } else {
+ return None;
+ }
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use prelude::*;
+ use realstd::fmt::{String};
+
+ fn same(fmt: &'static str, p: ~[Piece<'static>]) {
+ let mut parser = Parser::new(fmt);
+ assert_eq!(p, parser.collect());
+ }
+
+ fn fmtdflt() -> FormatSpec<'static> {
+ return FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "",
+ }
+ }
+
+ fn musterr(s: &str) {
+ Parser::new(s).next();
+ }
+
+ #[test]
+ fn simple() {
+ same("asdf", ~[String("asdf")]);
+ same("a\\{b", ~[String("a"), String("{b")]);
+ same("a\\#b", ~[String("a"), String("#b")]);
+ same("a\\}b", ~[String("a"), String("}b")]);
+ same("a\\}", ~[String("a"), String("}")]);
+ same("\\}", ~[String("}")]);
+ }
+
+ #[test] #[should_fail] fn invalid01() { musterr("{") }
+ #[test] #[should_fail] fn invalid02() { musterr("\\") }
+ #[test] #[should_fail] fn invalid03() { musterr("\\a") }
+ #[test] #[should_fail] fn invalid04() { musterr("{3a}") }
+ #[test] #[should_fail] fn invalid05() { musterr("{:|}") }
+ #[test] #[should_fail] fn invalid06() { musterr("{:>>>}") }
+
+ #[test]
+ fn format_nothing() {
+ same("{}", ~[Argument(Argument {
+ position: ArgumentNext,
+ format: fmtdflt(),
+ method: None,
+ })]);
+ }
+ #[test]
+ fn format_position() {
+ same("{3}", ~[Argument(Argument {
+ position: ArgumentIs(3),
+ format: fmtdflt(),
+ method: None,
+ })]);
+ }
+ #[test]
+ fn format_position_nothing_else() {
+ same("{3:}", ~[Argument(Argument {
+ position: ArgumentIs(3),
+ format: fmtdflt(),
+ method: None,
+ })]);
+ }
+ #[test]
+ fn format_type() {
+ same("{3:a}", ~[Argument(Argument {
+ position: ArgumentIs(3),
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "a",
+ },
+ method: None,
+ })]);
+ }
+ #[test]
+ fn format_align_fill() {
+ same("{3:>}", ~[Argument(Argument {
+ position: ArgumentIs(3),
+ format: FormatSpec {
+ fill: None,
+ align: Some(AlignRight),
+ flags: 0,
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "",
+ },
+ method: None,
+ })]);
+ same("{3:0<}", ~[Argument(Argument {
+ position: ArgumentIs(3),
+ format: FormatSpec {
+ fill: Some('0'),
+ align: Some(AlignLeft),
+ flags: 0,
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "",
+ },
+ method: None,
+ })]);
+ same("{3:*<abcd}", ~[Argument(Argument {
+ position: ArgumentIs(3),
+ format: FormatSpec {
+ fill: Some('*'),
+ align: Some(AlignLeft),
+ flags: 0,
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "abcd",
+ },
+ method: None,
+ })]);
+ }
+ #[test]
+ fn format_counts() {
+ same("{:10s}", ~[Argument(Argument {
+ position: ArgumentNext,
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountImplied,
+ width: CountIs(10),
+ ty: "s",
+ },
+ method: None,
+ })]);
+ same("{:10$.10s}", ~[Argument(Argument {
+ position: ArgumentNext,
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountIs(10),
+ width: CountIsParam(10),
+ ty: "s",
+ },
+ method: None,
+ })]);
+ same("{:.*s}", ~[Argument(Argument {
+ position: ArgumentNext,
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountIsNextParam,
+ width: CountImplied,
+ ty: "s",
+ },
+ method: None,
+ })]);
+ same("{:.10$s}", ~[Argument(Argument {
+ position: ArgumentNext,
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountIsParam(10),
+ width: CountImplied,
+ ty: "s",
+ },
+ method: None,
+ })]);
+ }
+ #[test]
+ fn format_flags() {
+ same("{:-}", ~[Argument(Argument {
+ position: ArgumentNext,
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: (1 << FlagSignMinus as uint),
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "",
+ },
+ method: None,
+ })]);
+ same("{:+#}", ~[Argument(Argument {
+ position: ArgumentNext,
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: (1 << FlagSignPlus as uint) | (1 << FlagAlternate as uint),
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "",
+ },
+ method: None,
+ })]);
+ }
+ #[test]
+ fn format_mixture() {
+ same("abcd {3:a} efg", ~[String("abcd "), Argument(Argument {
+ position: ArgumentIs(3),
+ format: FormatSpec {
+ fill: None,
+ align: None,
+ flags: 0,
+ precision: CountImplied,
+ width: CountImplied,
+ ty: "a",
+ },
+ method: None,
+ }), String(" efg")]);
+ }
+
+ #[test]
+ fn select_simple() {
+ same("{, select, other { haha } }", ~[Argument(Argument{
+ position: ArgumentNext,
+ format: fmtdflt(),
+ method: Some(~Select(~[], ~[String(" haha ")]))
+ })]);
+ same("{1, select, other { haha } }", ~[Argument(Argument{
+ position: ArgumentIs(1),
+ format: fmtdflt(),
+ method: Some(~Select(~[], ~[String(" haha ")]))
+ })]);
+ same("{1, select, other {#} }", ~[Argument(Argument{
+ position: ArgumentIs(1),
+ format: fmtdflt(),
+ method: Some(~Select(~[], ~[CurrentArgument]))
+ })]);
+ same("{1, select, other {{2, select, other {lol}}} }", ~[Argument(Argument{
+ position: ArgumentIs(1),
+ format: fmtdflt(),
+ method: Some(~Select(~[], ~[Argument(Argument{
+ position: ArgumentIs(2),
+ format: fmtdflt(),
+ method: Some(~Select(~[], ~[String("lol")]))
+ })])) // wat
+ })]);
+ }
+
+ #[test]
+ fn select_cases() {
+ same("{1, select, a{1} b{2} c{3} other{4} }", ~[Argument(Argument{
+ position: ArgumentIs(1),
+ format: fmtdflt(),
+ method: Some(~Select(~[
+ SelectArm{ selector: "a", result: ~[String("1")] },
+ SelectArm{ selector: "b", result: ~[String("2")] },
+ SelectArm{ selector: "c", result: ~[String("3")] },
+ ], ~[String("4")]))
+ })]);
+ }
+
+ #[test] #[should_fail] fn badselect01() {
+ musterr("{select, }")
+ }
+ #[test] #[should_fail] fn badselect02() {
+ musterr("{1, select}")
+ }
+ #[test] #[should_fail] fn badselect03() {
+ musterr("{1, select, }")
+ }
+ #[test] #[should_fail] fn badselect04() {
+ musterr("{1, select, a {}}")
+ }
+ #[test] #[should_fail] fn badselect05() {
+ musterr("{1, select, other }}")
+ }
+ #[test] #[should_fail] fn badselect06() {
+ musterr("{1, select, other {}")
+ }
+ #[test] #[should_fail] fn badselect07() {
+ musterr("{select, other {}")
+ }
+ #[test] #[should_fail] fn badselect08() {
+ musterr("{1 select, other {}")
+ }
+ #[test] #[should_fail] fn badselect09() {
+ musterr("{:d select, other {}")
+ }
+ #[test] #[should_fail] fn badselect10() {
+ musterr("{1:d select, other {}")
+ }
+
+ #[test]
+ fn plural_simple() {
+ same("{, plural, other { haha } }", ~[Argument(Argument{
+ position: ArgumentNext,
+ format: fmtdflt(),
+ method: Some(~Plural(None, ~[], ~[String(" haha ")]))
+ })]);
+ same("{:, plural, other { haha } }", ~[Argument(Argument{
+ position: ArgumentNext,
+ format: fmtdflt(),
+ method: Some(~Plural(None, ~[], ~[String(" haha ")]))
+ })]);
+ same("{, plural, offset:1 =2{2} =3{3} many{yes} other{haha} }",
+ ~[Argument(Argument{
+ position: ArgumentNext,
+ format: fmtdflt(),
+ method: Some(~Plural(Some(1), ~[
+ PluralArm{ selector: Right(2), result: ~[String("2")] },
+ PluralArm{ selector: Right(3), result: ~[String("3")] },
+ PluralArm{ selector: Left(Many), result: ~[String("yes")] }
+ ], ~[String("haha")]))
+ })]);
+ }
+}
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! This is an internal module used by the ifmt! runtime. These structures are
+//! emitted to static arrays to precompile format strings ahead of time.
+//!
+//! These definitions are similar to their `ct` equivalents, but differ in that
+//! these can be statically allocated and are slightly optimized for the runtime
+
+#[allow(missing_doc)];
+#[doc(hidden)];
+
+use either::Either;
+use fmt::parse;
+use option::Option;
+
+pub enum Piece<'self> {
+ String(&'self str),
+ // FIXME(#8259): this shouldn't require the unit-value here
+ CurrentArgument(()),
+ Argument(Argument<'self>),
+}
+
+pub struct Argument<'self> {
+ position: Position,
+ format: FormatSpec,
+ method: Option<&'self Method<'self>>
+}
+
+pub struct FormatSpec {
+ fill: char,
+ alignleft: bool,
+ flags: uint,
+ precision: parse::Count,
+ width: parse::Count,
+}
+
+pub enum Position {
+ ArgumentNext, ArgumentIs(uint)
+}
+
+pub enum Method<'self> {
+ Plural(Option<uint>, &'self [PluralArm<'self>], &'self [Piece<'self>]),
+ Select(&'self [SelectArm<'self>], &'self [Piece<'self>]),
+}
+
+pub struct PluralArm<'self> {
+ selector: Either<parse::PluralKeyword, uint>,
+ result: &'self [Piece<'self>],
+}
+
+pub struct SelectArm<'self> {
+ selector: &'self str,
+ result: &'self [Piece<'self>],
+}
}
impl MemWriter {
- pub fn new() -> MemWriter { MemWriter { buf: ~[] } }
+ pub fn new() -> MemWriter { MemWriter { buf: vec::with_capacity(128) } }
}
impl Writer for MemWriter {
pub mod run;
pub mod sys;
pub mod cast;
+pub mod fmt;
pub mod repr;
pub mod cleanup;
pub mod reflect;
pub use unstable;
pub use str;
pub use os;
+ pub use fmt;
+ pub use to_bytes;
}
ext::tt::macro_rules::add_new_extension));
syntax_expanders.insert(intern(&"fmt"),
builtin_normal_tt(ext::fmt::expand_syntax_ext));
+ syntax_expanders.insert(intern(&"ifmt"),
+ builtin_normal_tt(ext::ifmt::expand_syntax_ext));
syntax_expanders.insert(
intern(&"auto_encode"),
@SE(ItemDecorator(ext::auto_encode::expand_auto_encode)));
.. *afp};
let f = make_fold(f_pre);
- @f.fold_crate(c)
+ let ret = @f.fold_crate(c);
+ parse_sess.span_diagnostic.handler().abort_if_errors();
+ return ret;
}
// given a function from idents to idents, produce
--- /dev/null
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use ast;
+use codemap::{span, respan};
+use ext::base::*;
+use ext::base;
+use ext::build::AstBuilder;
+use rsparse = parse;
+use parse::token;
+
+use std::fmt::parse;
+use std::hashmap::{HashMap, HashSet};
+use std::vec;
+
+#[deriving(Eq)]
+enum ArgumentType {
+ Unknown,
+ Known(@str),
+ Unsigned,
+ String,
+}
+
+struct Context {
+ ecx: @ExtCtxt,
+ fmtsp: span,
+
+ // Parsed argument expressions and the types that we've found so far for
+ // them.
+ args: ~[@ast::expr],
+ arg_types: ~[Option<ArgumentType>],
+ // Parsed named expressions and the types that we've found for them so far
+ names: HashMap<@str, @ast::expr>,
+ name_types: HashMap<@str, ArgumentType>,
+
+ // Collection of the compiled `rt::Piece` structures
+ pieces: ~[@ast::expr],
+ name_positions: HashMap<@str, uint>,
+ method_statics: ~[@ast::item],
+
+ // Updated as arguments are consumed or methods are entered
+ nest_level: uint,
+ next_arg: uint,
+}
+
+impl Context {
+ /// Parses the arguments from the given list of tokens, returning None if
+ /// there's a parse error so we can continue parsing other fmt! expressions.
+ fn parse_args(&mut self, sp: span,
+ tts: &[ast::token_tree]) -> Option<@ast::expr> {
+ let p = rsparse::new_parser_from_tts(self.ecx.parse_sess(),
+ self.ecx.cfg(),
+ tts.to_owned());
+ if *p.token == token::EOF {
+ self.ecx.span_err(sp, "ifmt! expects at least one argument");
+ return None;
+ }
+ let fmtstr = p.parse_expr();
+ let mut named = false;
+ while *p.token != token::EOF {
+ if !p.eat(&token::COMMA) {
+ self.ecx.span_err(sp, "expected token: `,`");
+ return None;
+ }
+ if named || (token::is_ident(p.token) &&
+ p.look_ahead(1, |t| *t == token::EQ)) {
+ named = true;
+ let ident = match *p.token {
+ token::IDENT(i, _) => {
+ p.bump();
+ i
+ }
+ _ if named => {
+ self.ecx.span_err(*p.span,
+ "expected ident, positional arguments \
+ cannot follow named arguments");
+ return None;
+ }
+ _ => {
+ self.ecx.span_err(*p.span,
+ fmt!("expected ident for named \
+ argument, but found `%s`",
+ p.this_token_to_str()));
+ return None;
+ }
+ };
+ let name = self.ecx.str_of(ident);
+ p.expect(&token::EQ);
+ let e = p.parse_expr();
+ match self.names.find(&name) {
+ None => {}
+ Some(prev) => {
+ self.ecx.span_err(e.span, fmt!("duplicate argument \
+ named `%s`", name));
+ self.ecx.parse_sess.span_diagnostic.span_note(
+ prev.span, "previously here");
+ loop
+ }
+ }
+ self.names.insert(name, e);
+ } else {
+ self.args.push(p.parse_expr());
+ self.arg_types.push(None);
+ }
+ }
+ return Some(fmtstr);
+ }
+
+ /// Verifies one piece of a parse string. All errors are not emitted as
+ /// fatal so we can continue giving errors about this and possibly other
+ /// format strings.
+ fn verify_piece(&mut self, p: &parse::Piece) {
+ match *p {
+ parse::String(*) => {}
+ parse::CurrentArgument => {
+ if self.nest_level == 0 {
+ self.ecx.span_err(self.fmtsp,
+ "`#` reference used with nothing to \
+ reference back to");
+ }
+ }
+ parse::Argument(ref arg) => {
+ // argument first (it's first in the format string)
+ let pos = match arg.position {
+ parse::ArgumentNext => {
+ let i = self.next_arg;
+ if self.check_positional_ok() {
+ self.next_arg += 1;
+ }
+ Left(i)
+ }
+ parse::ArgumentIs(i) => Left(i),
+ parse::ArgumentNamed(s) => Right(s.to_managed()),
+ };
+ let ty = if arg.format.ty == "" {
+ Unknown
+ } else { Known(arg.format.ty.to_managed()) };
+ self.verify_arg_type(pos, ty);
+
+ // width/precision next
+ self.verify_count(arg.format.width);
+ self.verify_count(arg.format.precision);
+
+ // and finally the method being applied
+ match arg.method {
+ None => {}
+ Some(ref method) => { self.verify_method(pos, *method); }
+ }
+ }
+ }
+ }
+
+ fn verify_pieces(&mut self, pieces: &[parse::Piece]) {
+ for piece in pieces.iter() {
+ self.verify_piece(piece);
+ }
+ }
+
+ fn verify_count(&mut self, c: parse::Count) {
+ match c {
+ parse::CountImplied | parse::CountIs(*) => {}
+ parse::CountIsParam(i) => {
+ self.verify_arg_type(Left(i), Unsigned);
+ }
+ parse::CountIsNextParam => {
+ if self.check_positional_ok() {
+ self.verify_arg_type(Left(self.next_arg), Unsigned);
+ self.next_arg += 1;
+ }
+ }
+ }
+ }
+
+ fn check_positional_ok(&mut self) -> bool {
+ if self.nest_level != 0 {
+ self.ecx.span_err(self.fmtsp, "cannot use implicit positional \
+ arguments nested inside methods");
+ false
+ } else {
+ true
+ }
+ }
+
+ fn verify_method(&mut self, pos: Either<uint, @str>, m: &parse::Method) {
+ self.nest_level += 1;
+ match *m {
+ parse::Plural(_, ref arms, ref default) => {
+ let mut seen_cases = HashSet::new();
+ self.verify_arg_type(pos, Unsigned);
+ for arm in arms.iter() {
+ if !seen_cases.insert(arm.selector) {
+ match arm.selector {
+ Left(name) => {
+ self.ecx.span_err(self.fmtsp,
+ fmt!("duplicate selector \
+ `%?`", name));
+ }
+ Right(idx) => {
+ self.ecx.span_err(self.fmtsp,
+ fmt!("duplicate selector \
+ `=%u`", idx));
+ }
+ }
+ }
+ self.verify_pieces(arm.result);
+ }
+ self.verify_pieces(*default);
+ }
+ parse::Select(ref arms, ref default) => {
+ self.verify_arg_type(pos, String);
+ let mut seen_cases = HashSet::new();
+ for arm in arms.iter() {
+ if !seen_cases.insert(arm.selector) {
+ self.ecx.span_err(self.fmtsp,
+ fmt!("duplicate selector `%s`",
+ arm.selector));
+ } else if arm.selector == "" {
+ self.ecx.span_err(self.fmtsp,
+ "empty selector in `select`");
+ }
+ self.verify_pieces(arm.result);
+ }
+ self.verify_pieces(*default);
+ }
+ }
+ self.nest_level -= 1;
+ }
+
+ fn verify_arg_type(&mut self, arg: Either<uint, @str>, ty: ArgumentType) {
+ match arg {
+ Left(arg) => {
+ if arg < 0 || self.args.len() <= arg {
+ let msg = fmt!("invalid reference to argument `%u` (there \
+ are %u arguments)", arg, self.args.len());
+ self.ecx.span_err(self.fmtsp, msg);
+ return;
+ }
+ self.verify_same(self.args[arg].span, ty, self.arg_types[arg]);
+ if ty != Unknown || self.arg_types[arg].is_none() {
+ self.arg_types[arg] = Some(ty);
+ }
+ }
+
+ Right(name) => {
+ let span = match self.names.find(&name) {
+ Some(e) => e.span,
+ None => {
+ let msg = fmt!("There is no argument named `%s`", name);
+ self.ecx.span_err(self.fmtsp, msg);
+ return;
+ }
+ };
+ self.verify_same(span, ty,
+ self.name_types.find(&name).map(|&x| *x));
+ if ty != Unknown || !self.name_types.contains_key(&name) {
+ self.name_types.insert(name, ty);
+ }
+ // Assign this named argument a slot in the arguments array if
+ // it hasn't already been assigned a slot.
+ if !self.name_positions.contains_key(&name) {
+ let slot = self.name_positions.len();
+ self.name_positions.insert(name, slot);
+ }
+ }
+ }
+ }
+
+ /// When we're keeping track of the types that are declared for certain
+ /// arguments, we assume that `None` means we haven't seen this argument
+ /// yet, `Some(None)` means that we've seen the argument, but no format was
+ /// specified, and `Some(Some(x))` means that the argument was declared to
+ /// have type `x`.
+ ///
+ /// Obviously `Some(Some(x)) != Some(Some(y))`, but we consider it true
+ /// that: `Some(None) == Some(Some(x))`
+ fn verify_same(&self, sp: span, ty: ArgumentType,
+ before: Option<ArgumentType>) {
+ if ty == Unknown { return }
+ let cur = match before {
+ Some(Unknown) | None => return,
+ Some(t) => t,
+ };
+ if ty == cur { return }
+ match (cur, ty) {
+ (Known(cur), Known(ty)) => {
+ self.ecx.span_err(sp,
+ fmt!("argument redeclared with type `%s` when \
+ it was previously `%s`", ty, cur));
+ }
+ (Known(cur), _) => {
+ self.ecx.span_err(sp,
+ fmt!("argument used to format with `%s` was \
+ attempted to not be used for formatting",
+ cur));
+ }
+ (_, Known(ty)) => {
+ self.ecx.span_err(sp,
+ fmt!("argument previously used as a format \
+ argument attempted to be used as `%s`",
+ ty));
+ }
+ (_, _) => {
+ self.ecx.span_err(sp, "argument declared with multiple formats");
+ }
+ }
+ }
+
+ /// Translate a `parse::Piece` to a static `rt::Piece`
+ fn trans_piece(&mut self, piece: &parse::Piece) -> @ast::expr {
+ let sp = self.fmtsp;
+ let rtpath = |s: &str| {
+ ~[self.ecx.ident_of("std"), self.ecx.ident_of("fmt"),
+ self.ecx.ident_of("rt"), self.ecx.ident_of(s)]
+ };
+ let ctpath = |s: &str| {
+ ~[self.ecx.ident_of("std"), self.ecx.ident_of("fmt"),
+ self.ecx.ident_of("parse"), self.ecx.ident_of(s)]
+ };
+ let none = || {
+ let p = self.ecx.path(sp, ~[self.ecx.ident_of("None")]);
+ self.ecx.expr_path(p)
+ };
+ let some = |e: @ast::expr| {
+ self.ecx.expr_call_ident(sp, self.ecx.ident_of("Some"), ~[e])
+ };
+ let trans_count = |c: parse::Count| {
+ match c {
+ parse::CountIs(i) => {
+ self.ecx.expr_call_global(sp, ctpath("CountIs"),
+ ~[self.ecx.expr_uint(sp, i)])
+ }
+ parse::CountIsParam(i) => {
+ self.ecx.expr_call_global(sp, ctpath("CountIsParam"),
+ ~[self.ecx.expr_uint(sp, i)])
+ }
+ parse::CountImplied => {
+ let path = self.ecx.path_global(sp, ctpath("CountImplied"));
+ self.ecx.expr_path(path)
+ }
+ parse::CountIsNextParam => {
+ let path = self.ecx.path_global(sp, ctpath("CountIsNextParam"));
+ self.ecx.expr_path(path)
+ }
+ }
+ };
+ let trans_method = |method: &parse::Method| {
+ let method = match *method {
+ parse::Select(ref arms, ref default) => {
+ let arms = arms.iter().transform(|arm| {
+ let p = self.ecx.path_global(sp, rtpath("SelectArm"));
+ let result = arm.result.iter().transform(|p| {
+ self.trans_piece(p)
+ }).collect();
+ let s = arm.selector.to_managed();
+ let selector = self.ecx.expr_str(sp, s);
+ self.ecx.expr_struct(sp, p, ~[
+ self.ecx.field_imm(sp,
+ self.ecx.ident_of("selector"),
+ selector),
+ self.ecx.field_imm(sp, self.ecx.ident_of("result"),
+ self.ecx.expr_vec_slice(sp, result)),
+ ])
+ }).collect();
+ let default = default.iter().transform(|p| {
+ self.trans_piece(p)
+ }).collect();
+ self.ecx.expr_call_global(sp, rtpath("Select"), ~[
+ self.ecx.expr_vec_slice(sp, arms),
+ self.ecx.expr_vec_slice(sp, default),
+ ])
+ }
+ parse::Plural(offset, ref arms, ref default) => {
+ let offset = match offset {
+ Some(i) => { some(self.ecx.expr_uint(sp, i)) }
+ None => { none() }
+ };
+ let arms = arms.iter().transform(|arm| {
+ let p = self.ecx.path_global(sp, rtpath("PluralArm"));
+ let result = arm.result.iter().transform(|p| {
+ self.trans_piece(p)
+ }).collect();
+ let (lr, selarg) = match arm.selector {
+ Left(t) => {
+ let p = ctpath(fmt!("%?", t));
+ let p = self.ecx.path_global(sp, p);
+ (self.ecx.ident_of("Left"),
+ self.ecx.expr_path(p))
+ }
+ Right(i) => {
+ (self.ecx.ident_of("Right"),
+ self.ecx.expr_uint(sp, i))
+ }
+ };
+ let selector = self.ecx.expr_call_ident(sp,
+ lr, ~[selarg]);
+ self.ecx.expr_struct(sp, p, ~[
+ self.ecx.field_imm(sp,
+ self.ecx.ident_of("selector"),
+ selector),
+ self.ecx.field_imm(sp, self.ecx.ident_of("result"),
+ self.ecx.expr_vec_slice(sp, result)),
+ ])
+ }).collect();
+ let default = default.iter().transform(|p| {
+ self.trans_piece(p)
+ }).collect();
+ self.ecx.expr_call_global(sp, rtpath("Plural"), ~[
+ offset,
+ self.ecx.expr_vec_slice(sp, arms),
+ self.ecx.expr_vec_slice(sp, default),
+ ])
+ }
+ };
+ let life = self.ecx.lifetime(sp, self.ecx.ident_of("static"));
+ let ty = self.ecx.ty_path(self.ecx.path_all(
+ sp,
+ true,
+ rtpath("Method"),
+ Some(life),
+ ~[]
+ ), None);
+ let st = ast::item_static(ty, ast::m_imm, method);
+ let static_name = self.ecx.ident_of(fmt!("__static_method_%u",
+ self.method_statics.len()));
+ let item = self.ecx.item(sp, static_name, ~[], st);
+ self.method_statics.push(item);
+ self.ecx.expr_ident(sp, static_name)
+ };
+
+ match *piece {
+ parse::String(s) => {
+ self.ecx.expr_call_global(sp, rtpath("String"),
+ ~[self.ecx.expr_str(sp, s.to_managed())])
+ }
+ parse::CurrentArgument => {
+ let nil = self.ecx.expr_lit(sp, ast::lit_nil);
+ self.ecx.expr_call_global(sp, rtpath("CurrentArgument"), ~[nil])
+ }
+ parse::Argument(ref arg) => {
+ // Translate the position
+ let pos = match arg.position {
+ // These two have a direct mapping
+ parse::ArgumentNext => {
+ let path = self.ecx.path_global(sp,
+ rtpath("ArgumentNext"));
+ self.ecx.expr_path(path)
+ }
+ parse::ArgumentIs(i) => {
+ self.ecx.expr_call_global(sp, rtpath("ArgumentIs"),
+ ~[self.ecx.expr_uint(sp, i)])
+ }
+ // Named arguments are converted to positional arguments at
+ // the end of the list of arguments
+ parse::ArgumentNamed(n) => {
+ let n = n.to_managed();
+ let i = match self.name_positions.find_copy(&n) {
+ Some(i) => i,
+ None => 0, // error already emitted elsewhere
+ };
+ let i = i + self.args.len();
+ self.ecx.expr_call_global(sp, rtpath("ArgumentIs"),
+ ~[self.ecx.expr_uint(sp, i)])
+ }
+ };
+
+ // Translate the format
+ let fill = match arg.format.fill { Some(c) => c, None => ' ' };
+ let fill = self.ecx.expr_lit(sp, ast::lit_int(fill as i64,
+ ast::ty_char));
+ let align = match arg.format.align {
+ None | Some(parse::AlignLeft) => {
+ self.ecx.expr_bool(sp, true)
+ }
+ Some(parse::AlignRight) => {
+ self.ecx.expr_bool(sp, false)
+ }
+ };
+ let flags = self.ecx.expr_uint(sp, arg.format.flags);
+ let prec = trans_count(arg.format.precision);
+ let width = trans_count(arg.format.width);
+ let path = self.ecx.path_global(sp, rtpath("FormatSpec"));
+ let fmt = self.ecx.expr_struct(sp, path, ~[
+ self.ecx.field_imm(sp, self.ecx.ident_of("fill"), fill),
+ self.ecx.field_imm(sp, self.ecx.ident_of("alignleft"), align),
+ self.ecx.field_imm(sp, self.ecx.ident_of("flags"), flags),
+ self.ecx.field_imm(sp, self.ecx.ident_of("precision"), prec),
+ self.ecx.field_imm(sp, self.ecx.ident_of("width"), width),
+ ]);
+
+ // Translate the method (if any)
+ let method = match arg.method {
+ None => { none() }
+ Some(ref m) => {
+ let m = trans_method(*m);
+ some(self.ecx.expr_addr_of(sp, m))
+ }
+ };
+ let path = self.ecx.path_global(sp, rtpath("Argument"));
+ let s = self.ecx.expr_struct(sp, path, ~[
+ self.ecx.field_imm(sp, self.ecx.ident_of("position"), pos),
+ self.ecx.field_imm(sp, self.ecx.ident_of("format"), fmt),
+ self.ecx.field_imm(sp, self.ecx.ident_of("method"), method),
+ ]);
+ self.ecx.expr_call_global(sp, rtpath("Argument"), ~[s])
+ }
+ }
+ }
+
+ /// Actually builds the expression which the ifmt! block will be expanded
+ /// to
+ fn to_expr(&self) -> @ast::expr {
+ let mut lets = ~[];
+ let mut locals = ~[];
+ let mut names = vec::from_fn(self.name_positions.len(), |_| None);
+
+ // First, declare all of our methods that are statics
+ for &method in self.method_statics.iter() {
+ let decl = respan(self.fmtsp, ast::decl_item(method));
+ lets.push(@respan(self.fmtsp,
+ ast::stmt_decl(@decl, self.ecx.next_id())));
+ }
+
+ // Next, build up the static array which will become our precompiled
+ // format "string"
+ let fmt = self.ecx.expr_vec(self.fmtsp, self.pieces.clone());
+ let ty = ast::ty_fixed_length_vec(
+ self.ecx.ty_mt(
+ self.ecx.ty_path(self.ecx.path_all(
+ self.fmtsp,
+ true, ~[
+ self.ecx.ident_of("std"),
+ self.ecx.ident_of("fmt"),
+ self.ecx.ident_of("rt"),
+ self.ecx.ident_of("Piece"),
+ ],
+ Some(self.ecx.lifetime(self.fmtsp, self.ecx.ident_of("static"))),
+ ~[]
+ ), None),
+ ast::m_imm
+ ),
+ self.ecx.expr_uint(self.fmtsp, self.pieces.len())
+ );
+ let ty = self.ecx.ty(self.fmtsp, ty);
+ let st = ast::item_static(ty, ast::m_imm, fmt);
+ let static_name = self.ecx.ident_of("__static_fmtstr");
+ let item = self.ecx.item(self.fmtsp, static_name, ~[], st);
+ let decl = respan(self.fmtsp, ast::decl_item(item));
+ lets.push(@respan(self.fmtsp, ast::stmt_decl(@decl, self.ecx.next_id())));
+
+ // Right now there is a bug such that for the expression:
+ // foo(bar(&1))
+ // the lifetime of `1` doesn't outlast the call to `bar`, so it's not
+ // vald for the call to `foo`. To work around this all arguments to the
+ // fmt! string are shoved into locals.
+ for (i, &e) in self.args.iter().enumerate() {
+ if self.arg_types[i].is_none() { loop } // error already generated
+
+ let name = self.ecx.ident_of(fmt!("__arg%u", i));
+ lets.push(self.ecx.stmt_let(e.span, false, name, e));
+ locals.push(self.format_arg(e.span, Left(i), name));
+ }
+ for (&name, &e) in self.names.iter() {
+ if !self.name_types.contains_key(&name) { loop }
+
+ let lname = self.ecx.ident_of(fmt!("__arg%s", name));
+ lets.push(self.ecx.stmt_let(e.span, false, lname, e));
+ names[*self.name_positions.get(&name)] =
+ Some(self.format_arg(e.span, Right(name), lname));
+ }
+
+ let args = names.consume_iter().transform(|a| a.unwrap());
+ let mut args = locals.consume_iter().chain_(args);
+
+ // Next, build up the actual call to the sprintf function.
+ let result = self.ecx.expr_call_global(self.fmtsp, ~[
+ self.ecx.ident_of("std"),
+ self.ecx.ident_of("fmt"),
+ self.ecx.ident_of("sprintf"),
+ ], ~[
+ self.ecx.expr_ident(self.fmtsp, static_name),
+ self.ecx.expr_vec(self.fmtsp, args.collect()),
+ ]);
+
+ // sprintf is unsafe, but we just went through a lot of work to
+ // validate that our call is save, so inject the unsafe block for the
+ // user.
+ let result = self.ecx.expr_block(ast::Block {
+ view_items: ~[],
+ stmts: ~[],
+ expr: Some(result),
+ id: self.ecx.next_id(),
+ rules: ast::UnsafeBlock,
+ span: self.fmtsp,
+ });
+
+ self.ecx.expr_block(self.ecx.block(self.fmtsp, lets, Some(result)))
+ }
+
+ fn format_arg(&self, sp: span, arg: Either<uint, @str>,
+ ident: ast::ident) -> @ast::expr {
+ let mut ty = match arg {
+ Left(i) => self.arg_types[i].unwrap(),
+ Right(s) => *self.name_types.get(&s)
+ };
+ // Default types to '?' if nothing else is specified.
+ if ty == Unknown {
+ ty = Known(@"?");
+ }
+ let argptr = self.ecx.expr_addr_of(sp, self.ecx.expr_ident(sp, ident));
+ match ty {
+ Known(tyname) => {
+ let fmt_trait = match tyname.as_slice() {
+ "?" => "Poly",
+ "d" | "i" => "Signed",
+ "u" => "Unsigned",
+ "b" => "Bool",
+ "c" => "Char",
+ "o" => "Octal",
+ "x" => "LowerHex",
+ "X" => "UpperHex",
+ "s" => "String",
+ "p" => "Pointer",
+ _ => {
+ self.ecx.span_err(sp, fmt!("unknown format trait \
+ `%s`", tyname));
+ "Dummy"
+ }
+ };
+ let format_fn = self.ecx.path_global(sp, ~[
+ self.ecx.ident_of("std"),
+ self.ecx.ident_of("fmt"),
+ self.ecx.ident_of(fmt_trait),
+ self.ecx.ident_of("fmt"),
+ ]);
+ self.ecx.expr_call_global(sp, ~[
+ self.ecx.ident_of("std"),
+ self.ecx.ident_of("fmt"),
+ self.ecx.ident_of("argument"),
+ ], ~[self.ecx.expr_path(format_fn), argptr])
+ }
+ String => {
+ self.ecx.expr_call_global(sp, ~[
+ self.ecx.ident_of("std"),
+ self.ecx.ident_of("fmt"),
+ self.ecx.ident_of("argumentstr"),
+ ], ~[argptr])
+ }
+ Unsigned => {
+ self.ecx.expr_call_global(sp, ~[
+ self.ecx.ident_of("std"),
+ self.ecx.ident_of("fmt"),
+ self.ecx.ident_of("argumentuint"),
+ ], ~[argptr])
+ }
+ Unknown => { fail!() }
+ }
+ }
+}
+
+pub fn expand_syntax_ext(ecx: @ExtCtxt, sp: span,
+ tts: &[ast::token_tree]) -> base::MacResult {
+ let mut cx = Context {
+ ecx: ecx,
+ args: ~[],
+ arg_types: ~[],
+ names: HashMap::new(),
+ name_positions: HashMap::new(),
+ name_types: HashMap::new(),
+ nest_level: 0,
+ next_arg: 0,
+ pieces: ~[],
+ method_statics: ~[],
+ fmtsp: sp,
+ };
+ let efmt = match cx.parse_args(sp, tts) {
+ Some(e) => e,
+ None => { return MRExpr(ecx.expr_uint(sp, 2)); }
+ };
+ cx.fmtsp = efmt.span;
+ let fmt = expr_to_str(ecx, efmt,
+ ~"first argument to ifmt! must be a string literal.");
+
+ let mut err = false;
+ do parse::parse_error::cond.trap(|m| {
+ if !err {
+ err = true;
+ ecx.span_err(efmt.span, m);
+ }
+ }).inside {
+ for piece in parse::Parser::new(fmt) {
+ if !err {
+ cx.verify_piece(&piece);
+ let piece = cx.trans_piece(&piece);
+ cx.pieces.push(piece);
+ }
+ }
+ }
+ if err { return MRExpr(efmt) }
+
+ // Make sure that all arguments were used and all arguments have types.
+ for (i, ty) in cx.arg_types.iter().enumerate() {
+ if ty.is_none() {
+ ecx.span_err(cx.args[i].span, "argument never used");
+ }
+ }
+ for (name, e) in cx.names.iter() {
+ if !cx.name_types.contains_key(name) {
+ ecx.span_err(e.span, "named argument never used");
+ }
+ }
+
+ MRExpr(cx.to_expr())
+}
pub mod cfg;
pub mod fmt;
+ pub mod ifmt;
pub mod env;
pub mod bytes;
pub mod concat_idents;
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+ // bad arguments to the ifmt! call
+
+ ifmt!(); //~ ERROR: expects at least one
+ ifmt!("{}"); //~ ERROR: invalid reference to argument
+
+ ifmt!("{1}", 1); //~ ERROR: invalid reference to argument `1`
+ //~^ ERROR: argument never used
+ ifmt!("{foo}"); //~ ERROR: no argument named `foo`
+
+ ifmt!("{}", 1, 2); //~ ERROR: argument never used
+ ifmt!("{1}", 1, 2); //~ ERROR: argument never used
+ ifmt!("{}", 1, foo=2); //~ ERROR: named argument never used
+ ifmt!("{foo}", 1, foo=2); //~ ERROR: argument never used
+ ifmt!("", foo=2); //~ ERROR: named argument never used
+
+ ifmt!("{0:d} {0:s}", 1); //~ ERROR: redeclared with type `s`
+ ifmt!("{foo:d} {foo:s}", foo=1); //~ ERROR: redeclared with type `s`
+
+ ifmt!("{foo}", foo=1, foo=2); //~ ERROR: duplicate argument
+ ifmt!("#"); //~ ERROR: `#` reference used
+ ifmt!("", foo=1, 2); //~ ERROR: positional arguments cannot follow
+ ifmt!("" 1); //~ ERROR: expected token: `,`
+ ifmt!("", 1 1); //~ ERROR: expected token: `,`
+
+ ifmt!("{0, select, a{} a{} other{}}", "a"); //~ ERROR: duplicate selector
+ ifmt!("{0, plural, =1{} =1{} other{}}", 1u); //~ ERROR: duplicate selector
+ ifmt!("{0, plural, one{} one{} other{}}", 1u); //~ ERROR: duplicate selector
+
+ // bad syntax of the format string
+
+ ifmt!("{"); //~ ERROR: unterminated format string
+ ifmt!("\\ "); //~ ERROR: invalid escape
+ ifmt!("\\"); //~ ERROR: expected an escape
+
+ ifmt!("{0, }", 1); //~ ERROR: expected method
+ ifmt!("{0, foo}", 1); //~ ERROR: unknown method
+ ifmt!("{0, select}", "a"); //~ ERROR: must be followed by
+ ifmt!("{0, plural}", 1); //~ ERROR: must be followed by
+
+ ifmt!("{0, select, a{{}", 1); //~ ERROR: must be terminated
+ ifmt!("{0, select, {} other{}}", "a"); //~ ERROR: empty selector
+ ifmt!("{0, select, other{} other{}}", "a"); //~ ERROR: multiple `other`
+ ifmt!("{0, plural, offset: other{}}", "a"); //~ ERROR: must be an integer
+ ifmt!("{0, plural, offset 1 other{}}", "a"); //~ ERROR: be followed by `:`
+ ifmt!("{0, plural, =a{} other{}}", "a"); //~ ERROR: followed by an integer
+ ifmt!("{0, plural, a{} other{}}", "a"); //~ ERROR: unexpected plural
+ ifmt!("{0, select, a{}}", "a"); //~ ERROR: must provide an `other`
+ ifmt!("{0, plural, =1{}}", "a"); //~ ERROR: must provide an `other`
+
+ ifmt!("{0, plural, other{{0:s}}}", "a"); //~ ERROR: previously used as
+ ifmt!("{:s} {0, plural, other{}}", "a"); //~ ERROR: argument used to
+ ifmt!("{0, select, other{}} \
+ {0, plural, other{}}", "a");
+ //~^ ERROR: declared with multiple formats
+
+ // It should be illegal to use implicit placement arguments nested inside of
+ // format strings because otherwise the "internal pointer of which argument
+ // is next" would be invalidated if different cases had different numbers of
+ // arguments.
+ ifmt!("{0, select, other{{}}}", "a"); //~ ERROR: cannot use implicit
+ ifmt!("{0, plural, other{{}}}", 1); //~ ERROR: cannot use implicit
+ ifmt!("{0, plural, other{{1:.*d}}}", 1, 2); //~ ERROR: cannot use implicit
+}
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+ ifmt!("{0, plural, other{}}", "a");
+ //~^ ERROR: expected uint but found
+}
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+ ifmt!("{0, select, other{}}", 2);
+ //~^ ERROR: expected &str but found integral
+}
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+ ifmt!("{:d}", "3");
+ //~^ ERROR: failed to find an implementation of trait std::fmt::Signed
+}
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+ ifmt!("{:notimplemented}", "3");
+ //~^ ERROR: unknown format trait `notimplemented`
+}
--- /dev/null
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::fmt;
+
+struct A;
+struct B;
+
+#[fmt="foo"]
+impl fmt::Signed for A {
+ fn fmt(_: &A, f: &mut fmt::Formatter) { f.buf.write("aloha".as_bytes()); }
+}
+impl fmt::Signed for B {
+ fn fmt(_: &B, f: &mut fmt::Formatter) { f.buf.write("adios".as_bytes()); }
+}
+
+pub fn main() {
+ fn t(a: ~str, b: &str) { assert_eq!(a, b.to_owned()); }
+
+ // Make sure there's a poly formatter that takes anything
+ t(ifmt!("{}", 1), "1");
+ t(ifmt!("{}", A), "{}");
+ t(ifmt!("{}", ()), "()");
+ t(ifmt!("{}", @(~1, "foo")), "@(~1, \"foo\")");
+
+ // Various edge cases without formats
+ t(ifmt!(""), "");
+ t(ifmt!("hello"), "hello");
+ t(ifmt!("hello \\{"), "hello {");
+
+ // At least exercise all the formats
+ t(ifmt!("{:b}", true), "true");
+ t(ifmt!("{:c}", '☃'), "☃");
+ t(ifmt!("{:d}", 10), "10");
+ t(ifmt!("{:i}", 10), "10");
+ t(ifmt!("{:u}", 10u), "10");
+ t(ifmt!("{:o}", 10u), "12");
+ t(ifmt!("{:x}", 10u), "a");
+ t(ifmt!("{:X}", 10u), "A");
+ t(ifmt!("{:s}", "foo"), "foo");
+ t(ifmt!("{:p}", 0x1234 as *int), "0x1234");
+ t(ifmt!("{:p}", 0x1234 as *mut int), "0x1234");
+ t(ifmt!("{:d}", A), "aloha");
+ t(ifmt!("{:d}", B), "adios");
+ t(ifmt!("foo {:s} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃");
+ t(ifmt!("{1} {0}", 0, 1), "1 0");
+ t(ifmt!("{foo} {bar}", foo=0, bar=1), "0 1");
+ t(ifmt!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0");
+ t(ifmt!("{} {0:s}", "a"), "a a");
+ t(ifmt!("{} {0}", "a"), "\"a\" \"a\"");
+
+ // Methods should probably work
+ t(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 0u), "c0");
+ t(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 1u), "a1");
+ t(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 2u), "b2");
+ t(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 3u), "d3");
+ t(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "a"), "aa");
+ t(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "b"), "bb");
+ t(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "c"), "cc");
+ t(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "d"), "dd");
+ t(ifmt!("{1, select, a{#{0:s}} other{#{1}}}", "b", "a"), "ab");
+ t(ifmt!("{1, select, a{#{0}} other{#{1}}}", "c", "b"), "bb");
+}
+
projects / rust.git / commitdiff